attributes for common UI events
onclick a pointer button was clicked
ondblclick a pointer button was double clicked
onmousedown a pointer button was pressed down
onmouseup a pointer button was released
onmousemove a pointer was moved onto the element
onmouseout a pointer was moved away from the element
onkeypress a key was pressed and released
onkeydown a key was pressed down
onkeyup a key was released

extra - nested element in group of namespace http://maven.apache.org/XDOC/2.0

extra - nested element in group of namespace http://maven.apache.org/XDOC/2.0

extra - nested element in group of namespace http://maven.apache.org/XDOC/2.0